The woman who heads the IRS division under investigation for targeting conservative groups has pleaded the fifth. -- Lerner who heads the exempt organizations unit at the IRS. Decided not to testify today because of the ongoing criminal investigation but she remained adamant of her innocence. I have not done anything wrong. I have not broken any laws. I have not violated any IRS rules or regulations and I have not provided false information. To this or any other congressional committee. And while I would very much like to answer the committee's questions today. I've been advised by my counsel to assert my constitutional right not to testify or answer questions related to the subject matter of this hearing. Lerner said the Fifth Amendment -- there to protect the innocent and then she got up and left the congressional committee still has the power to subpoena more individual. And is expected to do so.

This transcript has been automatically generated and may not be 100% accurate.

{"id":19233989,"title":"IRS' Lois Lerner: 'I Have Not Broken Any Laws'","duration":"0:57","description":"The director of Exempt Organizations said she did not break any IRS rules, and then invoked the Fifth.","section":"Politics","mediaType":"Default"}